[IMAGING-163] Add XmpEmbedabble interface to parsers that support it #54
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An alternative propose to IMAGING-163. See #9 for another approach.
In this PR, a new interface
XmpEmbeddable
is added. ThegetXmpXml
method is removed from theImageParser
, and from any parser that was always returningnull
.Now, instead, only the parsers that currently support XMP metadata tags implement that method. Not all parsers will implement this interface, as not all image format specifications support XMP.